/* 
 * 日期插件
 * 滑动选取日期（年，月，日）
 * V1.1
 */
(function ($) {
    $.fn.date = function (options, Ycallback, Ncallback) {
        //插件默认选项
        var that = $(this);
        var docType = $(this).is('input');
        var datetime = true;
        var nowdate = new Date();
     //   alert(nowdate);
        var indexY = 1, indexM = 1, indexD = 1;
        var indexH = 1, indexI = 1, indexS = 0;
        var initY = parseInt((nowdate.getYear() + "").substr(1, 2));
        var initM = parseInt(nowdate.getMonth() + "") + 1;
        var initD = parseInt(nowdate.getDate() + "");
        var initH = parseInt(nowdate.getHours());
        var initI = parseInt(nowdate.getMinutes());
        var initS = parseInt(nowdate.getYear());
        var yearScroll = null, monthScroll = null, dayScroll = null;
        var HourScroll = null, MinuteScroll = null, SecondScroll = null;
        $.fn.date.defaultOptions = {
            beginyear: 1950,                 //日期--年--份开始
            endyear: 2050,                   //日期--年--份结束
            beginmonth: 1,                   //日期--月--份结束
            endmonth: 12,                    //日期--月--份结束
            beginday: 1,                     //日期--日--份结束
            endday: 31,                      //日期--日--份结束
            beginhour: 1,
            endhour: 12,
            beginminute: 00,
            endminute: 59,
            curdate: true,                   //打开日期是否定位到当前日期
            theme: "date",                    //控件样式（1：日期，2：日期+时间）
            mode: null,                       //操作模式（滑动模式）
            event: "click",                    //打开日期插件默认方式为点击后后弹出日期 
            show: true
        }
        //用户选项覆盖插件默认选项   
        var opts = $.extend(true, {}, $.fn.date.defaultOptions, options);
        if (opts.theme === "datetime") { datetime = true; }
        if (!opts.show) {
            that.unbind('click');
        }
        else {
            //绑定事件（默认事件为获取焦点）
            that.bind(opts.event, function () {
                createUL();      //动态生成控件显示的日期
                init_iScrll();   //初始化iscrll
                extendOptions(); //显示控件
                that.blur();
                if (datetime) {
                    showdatetime();
                    refreshTime();
                }
                refreshDate();
                bindButton();
            })
        };
        function refreshDate() {
            yearScroll.refresh();
            monthScroll.refresh();
            dayScroll.refresh();

            resetInitDete();
            yearScroll.scrollTo(0, initY * 40, 100, true);
            monthScroll.scrollTo(0, initM * 40 - 40, 100, true);
            dayScroll.scrollTo(0, initD * 40 - 40, 100, true);
        }
        function refreshTime() {
            HourScroll.refresh();
            MinuteScroll.refresh();
            SecondScroll.refresh();
            if (initH > 12) {    //判断当前时间是上午还是下午
                SecondScroll.scrollTo(0, initD * 40 - 40, 100, true);   //显示“下午”
                initH = initH - 12 - 1;
            }
            HourScroll.scrollTo(0, initH * 40, 100, true);
            MinuteScroll.scrollTo(0, initI * 40, 100, true);
            initH = parseInt(nowdate.getHours());
        }
        function resetIndex() {
            indexY = 1;
            indexM = 1;
            indexD = 1;
        }
        function resetInitDete() {
            if (opts.curdate) { return false; }
            else if (that.val() === "") { return false; }
            initY = parseInt(that.val().substr(2, 2));
            initM = parseInt(that.val().substr(5, 2));
            initD = parseInt(that.val().substr(8, 2));
        }
        function bindButton() {
            resetIndex();
            $("#dateconfirm").unbind('click').click(function () {
                var datestr = $("#yearwrapper ul li:eq(" + indexY + ")").html().substr(0, $("#yearwrapper ul li:eq(" + indexY + ")").html().length - 1) + "-" +
                          $("#monthwrapper ul li:eq(" + indexM + ")").html().substr(0, $("#monthwrapper ul li:eq(" + indexM + ")").html().length - 1) + "-" +
			  $("#daywrapper ul li:eq(" + Math.round(indexD) + ")").html().substr(0, $("#daywrapper ul li:eq(" + Math.round(indexD) + ")").html().length - 1);
                if (datetime) {
                    if (Math.round(indexS) === 1) {//下午
                        $("#Hourwrapper ul li:eq(" + indexH + ")").html(parseInt($("#Hourwrapper ul li:eq(" + indexH + ")").html().substr(0, $("#Hourwrapper ul li:eq(" + indexH + ")").html().length - 1)) + 12)
                    } else {
                        $("#Hourwrapper ul li:eq(" + indexH + ")").html(parseInt($("#Hourwrapper ul li:eq(" + indexH + ")").html().substr(0, $("#Hourwrapper ul li:eq(" + indexH + ")").html().length - 1)))
                    }
                    datestr += " " + $("#Hourwrapper ul li:eq(" + indexH + ")").html().substr(0, $("#Minutewrapper ul li:eq(" + indexH + ")").html().length - 1) + ":" +
                             $("#Minutewrapper ul li:eq(" + indexI + ")").html().substr(0, $("#Minutewrapper ul li:eq(" + indexI + ")").html().length - 1);
                    indexS = 0;
                }

                if (Ycallback === undefined) {
                    if (docType) { that.val(datestr); } else { that.html(datestr); }
                } else {
                    Ycallback(datestr);
                }
                $("#datePage").hide();
                $("#dateshadow").hide();
            });
            $("#datecancle").click(function () {
                $("#datePage").hide();
                $("#dateshadow").hide();
                Ncallback(false);
            });
        }
        function extendOptions() {
            $("#datePage").show();
            $("#dateshadow").show();
        }
        //日期滑动
        function init_iScrll() {
            var strY = $("#yearwrapper ul li:eq(" + indexY + ")").html().substr(0, $("#yearwrapper ul li:eq(" + indexY + ")").html().length - 1);
            var strM = $("#monthwrapper ul li:eq(" + indexM + ")").html().substr(0, $("#monthwrapper ul li:eq(" + indexM + ")").html().length - 1)
            yearScroll = new iScroll("yearwrapper", { snap: "li", vScrollbar: false,
                onScrollEnd: function () {
                    indexY = (this.y / 40) * (-1) + 1;
                    opts.endday = checkdays(strY, strM);
                    $("#daywrapper ul").html(createDAY_UL());
                    dayScroll.refresh();
                }
            });
            monthScroll = new iScroll("monthwrapper", { snap: "li", vScrollbar: false,
                onScrollEnd: function () {
                    indexM = (this.y / 40) * (-1) + 1;
                    opts.endday = checkdays(strY, strM);
                    $("#daywrapper ul").html(createDAY_UL());
                    dayScroll.refresh();
                }
            });
            dayScroll = new iScroll("daywrapper", { snap: "li", vScrollbar: false,
                onScrollEnd: function () {
                    indexD = (this.y / 40) * (-1) + 1;
                }
            });
        }
        function showdatetime() {
            init_iScroll_datetime();
            addTimeStyle();
            $("#datescroll_datetime").show();
            $("#Hourwrapper ul").html(createHOURS_UL());
            $("#Minutewrapper ul").html(createMINUTE_UL());
            $("#Secondwrapper ul").html(createSECOND_UL());
        }

        //日期+时间滑动
        function init_iScroll_datetime() {
            HourScroll = new iScroll("Hourwrapper", { snap: "li", vScrollbar: false,
                onScrollEnd: function () {
                    indexH = Math.round((this.y / 40) * (-1)) + 1;
                    HourScroll.refresh();
                }
            })
            MinuteScroll = new iScroll("Minutewrapper", { snap: "li", vScrollbar: false,
                onScrollEnd: function () {
                    indexI = Math.round((this.y / 40) * (-1)) + 1;
                    HourScroll.refresh();
                }
            })
            SecondScroll = new iScroll("Secondwrapper", { snap: "li", vScrollbar: false,
                onScrollEnd: function () {
                    indexS = Math.round((this.y / 40) * (-1));
                    HourScroll.refresh();
                }
            })
        }
        function checkdays(year, month) {
            var new_year = year;    //取当前的年份        
            var new_month = month++; //取下一个月的第一天，方便计算（最后一天不固定）        
            if (month > 12)            //如果当前大于12月，则年份转到下一年        
            {
                new_month -= 12;        //月份减        
                new_year++;            //年份增        
            }
            var new_date = new Date(new_year, new_month, 1);                //取当年当月中的第一天        
            return (new Date(new_date.getTime() - 1000 * 60 * 60 * 24)).getDate(); //获取当月最后一天日期    
        }
        function createUL() {
            CreateDateUI();
            $("#yearwrapper ul").html(createYEAR_UL());
            $("#monthwrapper ul").html(createMONTH_UL());
            $("#daywrapper ul").html(createDAY_UL());
        }
        function CreateDateUI() {
            var str = '' +
                '<div id="dateshadow"></div>' +
                '<div id="datePage" class="page">' +
                    '<section>' +
                        '<div id="datetitle"><h1>请选择日期</h1></div>' +
                        '<div id="datemark"><a id="markyear"></a><a id="markmonth"></a><a id="markday"></a></div>' +
                        '<div id="timemark"><a id="markhour"></a><a id="markminut"></a><a id="marksecond"></a></div>' +
                        '<div id="datescroll">' +
                            '<div id="yearwrapper">' +
                                '<ul></ul>' +
                            '</div>' +
                            '<div id="monthwrapper">' +
                                '<ul></ul>' +
                            '</div>' +
                            '<div id="daywrapper">' +
                                '<ul></ul>' +
                            '</div>' +
                        '</div>' +
                        '<div id="datescroll_datetime">' +
                            '<div id="Hourwrapper">' +
                                '<ul></ul>' +
                            '</div>' +
                            '<div id="Minutewrapper">' +
                                '<ul></ul>' +
                            '</div>' +
                            '<div id="Secondwrapper">' +
                                '<ul></ul>' +
                            '</div>' +
                        '</div>' +
                    '</section>' +
                    '<footer id="dateFooter">' +
                        '<div id="setcancle">' +
                            '<ul>' +
                                '<li id="dateconfirm">确定</li>' +
                                '<li id="datecancle">取消</li>' +
                            '</ul>' +
                        '</div>' +
                    '</footer>' +
                '</div>'
            $("#datePlugin").html(str);
        }
        function addTimeStyle() {
            $("#datePage").css("height", "380px");
            $("#datePage").css("top", "60px");
            $("#yearwrapper").css("position", "absolute");
            $("#yearwrapper").css("bottom", "200px");
            $("#monthwrapper").css("position", "absolute");
            $("#monthwrapper").css("bottom", "200px");
            $("#daywrapper").css("position", "absolute");
            $("#daywrapper").css("bottom", "200px");
        }
        //创建 --年-- 列表
        function createYEAR_UL() {
            var str = "<li>&nbsp;</li>";
            for (var i = opts.beginyear; i <= opts.endyear; i++) {
                str += '<li>' + i + '年</li>'
            }
            return str + "<li>&nbsp;</li>"; ;
        }
        //创建 --月-- 列表
        function createMONTH_UL() {
            var str = "<li>&nbsp;</li>";
            for (var i = opts.beginmonth; i <= opts.endmonth; i++) {
                if (i < 10) {
                    i = "0" + i
                }
                str += '<li>' + i + '月</li>'
            }
            return str + "<li>&nbsp;</li>"; ;
        }
        //创建 --日-- 列表
        function createDAY_UL() {
            $("#daywrapper ul").html("");
            var str = "<li>&nbsp;</li>";
            for (var i = opts.beginday; i <= opts.endday; i++) {
                str += '<li>' + i + '日</li>'
            }
            return str + "<li>&nbsp;</li>"; ;
        }
        //创建 --时-- 列表
        function createHOURS_UL() {
            var str = "<li>&nbsp;</li>";
            for (var i = opts.beginhour; i <= opts.endhour; i++) {
                str += '<li>' + i + '时</li>'
            }
            return str + "<li>&nbsp;</li>"; ;
        }
        //创建 --分-- 列表
        function createMINUTE_UL() {
            var str = "<li>&nbsp;</li>";
            for (var i = opts.beginminute; i <= opts.endminute; i++) {
                if (i < 10) {
                    i = "0" + i
                }
                str += '<li>' + i + '分</li>'
            }
            return str + "<li>&nbsp;</li>"; ;
        }
        //创建 --分-- 列表
        function createSECOND_UL() {
            var str = "<li>&nbsp;</li>";
            str += "<li>上午</li><li>下午</li>"
            return str + "<li>&nbsp;</li>"; ;
        }
    }
})(jQuery);  
